Open Season is the second studio album by English indie rock band British Sea Power, released on 4 April 2005 through Rough Trade Records. Following their critically acclaimed but chaotic debut, this record adopted a more accessible, melodic, and polished sound. This sonic shift was largely shaped by producer Mads Bjerke and legendary mixer Bill Price, who helped refine the band's sprawling post-punk energy into sweeping, atmospheric anthems. The transition proved commercially successful, peaking at No. 13 on the UK Albums Chart and spawning two top-40 singles: the driving "It Ended on an Oily Stage" and the soaring "Please Stand Up."
Lyrically, the album retains the band’s signature eccentric and literate themes, trading traditional rock clichés for explorations of history, geography, and the natural world. Notable tracks include "Oh Larsen B," an elegy for a collapsed Antarctic ice shelf, and "North Hanging Rock," which draws inspiration from classic literature. While some early fans missed the jagged aggression of their initial work, Open Season solidified the group's reputation for creating lush, widescreen indie rock wrapped in a distinctly British romanticism.

